I think after they have produced their figs, and you have enjoyed them, stop pinching, let them go dormant, then when 5 leaves appear in spring on the shoots, pinch!
Mine are done here in the hot desert. There are no more figs. So if I pinched it would be for fullness, not figs. At this time, best to wait till dormancy, prune, save the cuttings for propagation, and then pinch like crazy when the new growth begins.
JMHO
Suzi